Last reviewed: June 2026
TL;DR- A buyer's survey is commissioned by and for the buyer to assess the property's condition - it is separate from the lender's mortgage valuation.
- RICS Level 2 (HomeBuyer Report) is appropriate for most standard properties in reasonable condition.
- RICS Level 3 (Building Survey) is recommended for older properties, those with visible defects, unusual construction or listed buildings.
- Survey costs range from £400 (Level 2) to £1,500+ (Level 3 on complex properties) depending on the property value, type and location.
The Three RICS Survey Levels
RICS (Royal Institution of Chartered Surveyors) categorises residential surveys into three levels of assessment:
- Level 1 (Condition Report): the lightest assessment, using a traffic light rating system for visible elements. Suitable for new build properties or straightforward modern properties in obviously good condition. Does not include a market valuation.
- Level 2 (HomeBuyer Report): the most commonly used survey for standard residential properties. Includes a condition assessment of all visible and accessible elements, identification of significant defects and risks, and a market valuation. Uses a condition rating system (1 = no repair required, 2 = defects requiring attention, 3 = defects requiring urgent attention or further investigation).
- Level 3 (Building Survey): the most comprehensive assessment, with detailed examination of all visible and accessible elements and description of construction, condition, defects and recommended action. Most appropriate for older properties (pre-1900), properties with visible issues, unusual or non-standard construction, listed buildings, or any property where the buyer wants maximum information before purchasing.
When to Choose Level 2 vs Level 3
Level 2 is appropriate for: standard brick construction properties built after 1945 that appear in reasonable condition; straightforward resale flats with no obvious concerns; and properties where the buyer is comfortable with a lighter assessment given the property type.
Level 3 is recommended for: any property built before 1930; properties with thatched roofs, timber frames, stone or unusual construction; properties showing visible signs of defects (cracking, damp, roof issues); properties with significant extensions or alterations; listed buildings; and any property where the buyer has concerns or where the purchase price is high relative to comparables.
Survey Cost vs Risk
A survey costs between £400 and £1,500+ depending on the level and property. This represents a small fraction of the purchase price for most buyers. Purchasing a property without a survey, and subsequently discovering major defects, can cost far more than the survey fee to remediate. The survey also provides information that can be used to negotiate on price if significant defects are identified. The survey cost is therefore generally excellent value for the risk mitigation it provides.
What Surveys Do Not Cover
Even a Level 3 Building Survey has limitations: it assesses only visible and accessible elements. It does not investigate hidden drains, underground structures, electrical wiring (beyond visible evidence of potential issues), plumbing systems, or areas concealed behind fitted furniture or finishes. Specialist reports from drainage surveyors, electricians, plumbers and structural engineers may be recommended as follow-up investigations where the survey identifies concerns in these areas.
Frequently Asked Questions
Can I combine the mortgage valuation with a buyer's survey?
Some lenders offer a combined valuation and HomeBuyer Report, where the lender's appointed surveyor also produces a Level 2 report for the buyer. This can be more cost-effective than commissioning two separate reports. However, the buyer should be aware that a combined report involves a potential conflict - the surveyor is acting for both lender and buyer. A separate, independently commissioned survey from a RICS surveyor of the buyer's own choosing removes this potential conflict.
When should I commission a survey - before or after the mortgage offer?
The survey should be commissioned as early as possible in the purchase process - ideally once an offer has been accepted and before exchange of contracts. Survey results may affect the decision to proceed, the price negotiation or the conditions attached to exchange. Commissioning a survey after exchange provides no opportunity to act on the findings in terms of withdrawal or renegotiation.
What happens if the survey reveals serious defects?
Serious defects identified in a survey give the buyer information with which to: renegotiate the purchase price to reflect the cost of remediation; request that the seller carries out remediation before exchange; or withdraw from the purchase (before exchange without legal penalty; after exchange with significant financial penalty). The buyer should obtain professional estimates for any recommended remedial work before deciding how to proceed.
Do lenders require a buyer's survey as a condition of the mortgage?
No. Lenders require their own valuation (which they arrange) but do not require the buyer to commission a separate survey. However, a buyer's survey is strongly recommended as good practice for any purchase - the absence of a lender requirement does not mean it is unnecessary. Many experienced buyers and property professionals regard commissioning a survey as essential before any purchase.
